Build-up of double carbohelicenes using nitroarenes: dual role of the nitro functionality as an activating and leaving group
作者:Fulin Zhou、Fujian Zhou、Rongchuan Su、Yudong Yang、Jingsong You
DOI:10.1039/d0sc02058c
日期:——
streamlined and simplified synthetic route to double carbohelicenes starting from nitroarenes through sequential nitro-activated ortho-C–H arylation, denitrative alkenylation and intramolecular cyclodehydrogenation. In this synthetic strategy, the nitro group plays a dual role namely as a leaving group for the denitrative alkenylation and as an activating group for ortho-C–H arylation, which is distinct
双碳烯的构建是一项非常有趣但具有挑战性的工作。本文公开了从硝基芳烃开始,通过顺序硝基活化的邻-C-H芳基化、脱硝基烯基化和分子内环脱氢来生产双碳螺旋烯的精简且简化的合成路线。在该合成策略中,硝基发挥双重作用,即作为脱硝烯基化的离去基团和作为邻-C-H芳基化的活化基团,这与传统偶联反应中的芳基卤化物不同。在这项工作中,提出了钯催化的硝基芳烃的 Heck 型烯基化反应,其中传统惰性的 Ar-NO 2键被裂解。这项工作为多环芳烃(PAH)提供了一种新颖的合成策略。